Isolating problematic coil packs

[ST240]

I was having major issues with spark breakup/blow out at anything above 1 bar and 4000 rpm on my hx35 rb30. That thing is flowing some air man. So I had a DTC that said Ignition module which I'm assuming is the ignitor, but the ignitor was fine.

I used liquid E-tape, E-tape, and rubber isolators on the coil packs and i STILL had blow out. Swapped my coils for a decently used set, and the blowout improved, but is still there at slightly at 1.5 bar and 5000 rpm. I think the underhood temp greatly affects the life of these things because everytime I turn around blow out pops outta nowhere...

Is there a way to isolate which coil packs are weak without replacing them one by one? That might take some time. A lot of time. The kind of time that makes a guy want to say f*** it, go LS2 coils and be done with it lol.

[Cjmartz2k]

Leave the center cover off and it makes them pretty easy to trouble shoot one by one. Did you change the plugs? Once they foul out, you need to change them.

[Sil240]

The LS2 conversion was pretty easy.
It just takes a little time to make the harness and bracket.

Remember all the coilpacks you get are going to be around 12-20 years old.
Unless you get Q45 packs.

[Zacho2]

On stock coils at 1.5+ I had to gap down, .8mm didn't work. I hit my blowout pretty much 5-5.5k every time.

Another idea, well perhaps. A lot of people use the BKR7E plugs, and I find they are good but they don't seem to contact the spring inside decently used coils as well as other plugs. Compared to the non v-tipped BCPR7ES I found the BKR plugs to be in the range of 1.5-2mm shorter. Something to ponder I guess.

I personally am a big believer in OEM nissan coils. If you make enough power, just get a kenne bell boost-a-spark. I think most people swap to other coils because they loose hope in OEM's but I was amazed at the difference with brand new OEM coils in a friends car.

[ST240]

Yeah i changed the plugs and no difference. I also ran a smaller gap at around .7. I could try smaller? lol. Im running bcpr6es. I guess id just have to switch them out one by one until the breakup was gone?

Sil240: can i run the stock rb20 signal harness and delete the ignitor?

[flatrate]

you should be using 7's on 1.5 bar and an Hx35.... if you have a good EMS you can increase dwell... that made mine go away

[ST240]

Really?? How would a colder plug improve blow out? Dwell time or duty cycle? I'm running nistune so i can adjust both. They warn though that messing with duty cycle can harm your coils.

[Cjmartz2k]

I'm a big proponant of factory coils as well, but I'm in Japan so it's a lot easier to find replacement coils. I've used junkyard n/a RB20 coils on my set up over 500rwhp and at 1.8 bar with no problems. For ease of access and trouble shooting, as well as just sheer spark power, the LS coils are hard to over look though. I might go that way if I was stateside.

[Sil240]

I was told to run 7's with a gap of .023" or .6 mm.

Read this thread I made: RB20 --> LS2 coils
ls2-truck-coil-swap-t478565.html?hilit=LS2%20Truck

The nissan coils work well. They do their job.
But they're also OLD, to buy new ones are expensive too.

For me it really comes down to $$.
These coils will not be used to their potential with my setup.
But they're Domestic and I can replace them quickly and easily.

But they are a huge upgrade compared to the stock coils.
Plus they're moved out of the head valley.
And you take 1 more link out of the chain. (the Ignitor)

CJmartz2k- If you need coils lmk. I got mine off of ebay from CA.
$250 brand new for a set of 8. Free shipping.

[ST240]

Lol jeez the gap keeps getting smaller! I suppose I could try the 7s gapped to .6 this season... Baller thread man thanks. Props to you and that other guy (I forget his name) for making good threads. That should be more than enough info for me to get by.

Cjmartz2k: I know what you mean. I'd like to stick with stock gear. And I think there's inconspicuous underlying issues which can be resolved to make the stockers work well. But for the level of ease, price and performance, the LS coil swap is a no brainer to me. I can't hardly get to tunning because WOT pulls = blow out. Sick of it .

[ST240]

Question:

I swapped the problematic set out for another set, and they seemed to work quite a bit better. Fast forward a few days to today, and now they're just as bad as the other ones were... What could be causing them to die like that? Is it my underhood temps? My coolant temps have been fine. When the heat gets to them, does it do permanent damage or their performance only suffers when they're hot...